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Activation of Nitriles by Trichloro[2-(dialkylphosphanyl)imidazol-1-yl]silanes – Synthesis and Characterization of New Dinuclear Pentacoordinate Silicon(IV) Complexes with Bridging Imido-Nitrogen Ligand Atoms


  • Dedicated to Professor Gerhard Bringmann on the occasion of his 60th birthday


Trichloro[2-(dialkylphosphanyl)imidazol-1-yl]silanes 3 and 4 react with aceto- or propionitrile to yield the dinuclear pentacoordinate silicon(IV) complexes 58, which contain two bridging dianionic N,N-ligands generated by silicon-mediated nitrile activation. Compounds 58 contain two SiCl2N3 skeletons, with two imido-nitrogen ligand atoms that bridge the silicon coordination centers. The pentacoordinate silicon(IV) complexes 58 were characterized by elemental analysis, single-crystal X-ray diffraction, and solid-state NMR spectroscopy.